MRCPsych Paper A is the sciences paper. It tests the biological, psychological, and social sciences underpinning psychiatry rather than clinical management. Candidates who approach it as a clinical exam consistently underperform — the content is fundamentally different from what you do on the ward.
The exam contains 150 questions (SBA and EMQ mix) delivered in three hours, with three diets per year — typically April, July, and October.
Why Paper A catches people out
Paper A has a lower pass rate than many candidates expect. The most common reason is underestimating the psychopharmacology weighting. Approximately 25 per cent of the exam tests drug mechanisms, receptor pharmacology, pharmacokinetics, drug interactions, and side effect profiles at a level of detail that goes well beyond prescribing knowledge. Knowing that an SSRI treats depression is insufficient — you need to know which serotonin receptor subtypes are involved, the cytochrome P450 interactions, the pharmacokinetic differences between individual SSRIs, and the mechanism of serotonin syndrome.
The second common failure point is neuroscience and neuroanatomy. Questions test neuroanatomical localisation, neurotransmitter pathways, neurophysiology (EEG patterns, sleep architecture), and neuropathology. Candidates with limited neuroscience backgrounds from medical school find this section particularly challenging.
Psychology — covering learning theory, cognitive psychology, developmental psychology, and social psychology — accounts for roughly 15 per cent. Statistics and research methods account for 10 per cent, testing NNT calculations, study design interpretation, and basic statistical concepts. Genetics and epidemiology account for another 10 per cent.
The EMQ component
Paper A includes EMQ sets alongside SBAs. EMQs present a theme (for example, neurotransmitter receptor pharmacology) with eight options and three clinical stems. The technique is different from SBA — you read the options first, then match each stem to the single best option.
EMQs in Paper A tend to test pattern recognition in basic sciences rather than clinical management. Typical themes include receptor binding profiles, defence mechanisms, psychological theories, study design types, and neuroanatomical localisation. Practising EMQs specifically — not just SBAs — is essential because the cognitive process is different.
Revision strategy
Allocate at least three months of focused revision. Given the 25 per cent pharmacology weighting, start there. Stahl's Essential Psychopharmacology remains the standard reference, but it is dense — use question bank practice to identify which chapters to prioritise. Focus on mechanism of action, receptor profiles, pharmacokinetics, interactions (especially CYP450), and side effect profiles for all major drug classes: antipsychotics (typical and atypical), antidepressants (SSRIs, SNRIs, TCAs, MAOIs, mirtazapine), mood stabilisers (lithium, valproate, carbamazepine, lamotrigine), anxiolytics, and hypnotics.
For neuroscience, focus on the limbic system, basal ganglia pathways (direct and indirect), neurotransmitter synthesis and metabolism, and functional neuroanatomy. For psychology, cover classical and operant conditioning, cognitive schemas, attachment theory, and Piaget's developmental stages. For statistics, ensure you can calculate NNT, NNH, sensitivity, specificity, positive and negative predictive values, and interpret confidence intervals and p-values.
Using iatroX for Paper A
iatroX's MRCPsych Paper A bank contains over 1,500 questions including both SBA and EMQ formats. EMQ sets are grouped by theme — neurotransmitter pharmacology, defence mechanisms, study design — replicating the real exam structure. The adaptive algorithm tracks your performance across all content domains and shifts focus toward your weakest areas, which is critical when the content spans pharmacology, neuroscience, psychology, genetics, and statistics in a single paper.
The bank references Stahl's, the Maudsley Prescribing Guidelines, the Oxford Textbook of Psychiatry, and ICD-11/DSM-5 classification. Full mock exams simulate the 150-question, three-hour format. Mobile app access means you can fit pharmacology revision into clinical downtime. All included at £29 per month or £99 per year.
Key takeaway
Paper A is a science exam, not a clinical exam. Treat it as such. Allocate 25 per cent of your revision time to pharmacology, dedicate specific sessions to neuroscience and statistics, and practise EMQs as a distinct question format. Candidates who approach Paper A with a clinical mindset — trying to answer from ward experience rather than textbook science — are the ones who fail.